Dell KVM 1081ad – Internet Explorer is unable to connect to HTTPS // SSL webinterface

This article was written together with Florian Hilgenberg Dell Enterprise Engineer


When you are unable to connect to HTTPS // SSL Webinterface with your Internet Explorer please check if you have Microsoft update KB2661254  installed.

This update changes the “minimum certificate key length” and causes the issue.








Update information:

Microsoft has released a Microsoft security advisory for IT professionals. This advisory announces that the use of RSA certificates that have keys that are less than 1024 bits long will be blocked. To view the security advisory, go to the following Microsoft website:

To reduce the risk of unauthorized exposure of sensitive information, Microsoft has released a nonsecurity update (KB 2661254) for all supported versions of Microsoft Windows. This update will block cryptographic keys that are less than 1024 bits long. This update does not apply to Windows 8 Release Preview or Windows Server 2012 Release Candidate because these operating systems already include the functionality to block the use of weak RSA keys that are less than 1024 bits long.

Source: (Microsoft Security Advisory: Update for minimum certificate key length)


To fix the issue, you can uninstall the update or use an other browser. The Dell KVM 1081ad can use 128bit encryption.

The SCS supports 128-bit SSL(ARCFOUR), AES, DES, and 3DES encryption of keyboard/mouse, video, and virtual media sessions.

Source: Dell™ Server Console Switch User’s Guide